Those little swarming wiggly wormy things ( I have to find the name of them one of these days) can be a lot of fun. Try holding your light still next to a coral head and see how many of them get eaten by the coral. Especially the brain corals. They look really hairy at night and those little tentacles are hungry. Sometimes when they catch a worm it looks like the worm actually pops! The later in the evening the more of those warms show but more in the summertime then winter.